========================================================================== Ubuntu Security Notice USN-2002-1 October 23, 2013
A security issue affects these releases of Ubuntu and its derivatives:
Keystone would improperly grant access to invalid tokens under certain circumstances.
Software Description: - keystone: OpenStack identity service
Chmouel Boudjnah discovered that Keystone did not properly invalidate user tokens when a tenant was disabled which allowed an authenticated user to retain access via the token. (CVE-2013-4222)
Kieran Spear discovered that Keystone did not properly verify PKI tokens when performing revocation when using the memcache and KVS backends. An authenticated attacker could exploit this to bypass intended access restrictions. (CVE-2013-4294)
The problem can be corrected by updating your system to the following package versions:
Ubuntu 13.04: python-keystone 1:2013.1.3-0ubuntu1.1
Ubuntu 12.10: python-keystone 2012.2.4-0ubuntu3.2
In general, a standard system update will make all the necessary changes.
References: http://www.ubuntu.com/usn/usn-2002-1 CVE-2013-4222, CVE-2013-4294
Package Information: https://launchpad.net/ubuntu/+source/keystone/1:2013.1.3-0ubuntu1.1 https://launchpad.net/ubuntu/+source/keystone/2012.2.4-0ubuntu3.2
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